QTfrontend/rndstr.cpp
author unc0rr
Wed, 26 Jul 2006 12:25:48 +0000
changeset 87 ff213e443336
parent 33 d6363050cad0
permissions -rw-r--r--
Convert all pages to classes
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/*
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 * Hedgewars, a worms-like game
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 * Copyright (c) 2005 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * Distributed under the terms of the BSD-modified licence:
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy
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 * of this software and associated documentation files (the "Software"), to deal
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 * with the Software without restriction, including without limitation the
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 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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 * sell copies of the Software, and to permit persons to whom the Software is
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 * furnished to do so, subject to the following conditions:
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 *
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 * 1. Redistributions of source code must retain the above copyright notice,
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 *    this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 *    this list of conditions and the following disclaimer in the documentation
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 *    and/or other materials provided with the distribution.
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 * 3. The name of the author may not be used to endorse or promote products
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 *    derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <QDateTime>
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#include "rndstr.h"
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const char * letters = "qwertyuiopasdfghjklzxcvbnm" \
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                       "QWERTYUIOPASDFGHJKLZXCVBNM" \
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                       "0123456789";
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const quint8 letterscnt = 62;
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const char * upd = "/hw!/";
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const quint8 updcnt = 5;
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RNDStr::RNDStr()
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{
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	SHA1Init(&ctx);
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	QDateTime now = QDateTime::currentDateTime();
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	QDateTime zero;
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	int secs = now.secsTo(zero);
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	SHA1Update(&ctx, (quint8 *)&secs, sizeof(int));
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}
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void RNDStr::GenRNDStr(QString & str, quint32 len)
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{
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	str = "";
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	sha1_ctxt tmpctx;
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	sha1_digest digest;
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	for(quint32 i = 0; i < len; i++)
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	{
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		SHA1Update(&ctx, (quint8 *)upd, updcnt);
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		qMemCopy(&tmpctx, &ctx, sizeof(sha1_ctxt));
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		SHA1Final(digest, &tmpctx);
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		int index = (digest[3] + digest[11] + digest[17]) % letterscnt;
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		str += letters[index];
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	}
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}